JPH10106697A - Electric connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of defectives resulting from the mounting error of an electric connector by forming projecting and recessed parts on one of the pair of outer surfaces of an insulating housing extended parallel to the aligning direction of contact mounting holes. SOLUTION: Marker grooves 7 which are projecting and recessed parts are formed on one 1c of the outer surfaces of an insulating housing 1A, the grooves 7 extending in the direction of insertion of the connecting end 2a of a flexible printed board 2A. The grooves 7 are provided only on the outer surface 1c in order to discriminate between the front and back of the housing 1A, and not on the other outer surface 1d. Thus, since the plurality of grooves 7 are formed in the entire outer surface 1c of the housing 1A, the front and back of an electric connector can be distinguished one from the other at the first sight of the housing 1A. Therefore when the electric connector is mounted on the surface of the printed board 6A, whether or not the mounting position of the connector is correct can easily be determined visually, whereby the occurrence of defects due to the error of discriminating between the front and rear of the connector can be surely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector for connecting a flexible printed board or flat face board to a printed wiring board on which functional elements are mounted.

[0002]

2. Description of the Related Art In general, in an electronic device, an electrical connector fixed to a printed wiring board is provided between a printed wiring board on which functional elements are mounted and a flexible printed board or flat face board led from a peripheral function section. The conventional straight type flexible printed circuit board connector used for this purpose is
The structure is as shown in FIGS.

[0003] That is, the insulating housing A to resin molding as an elongated rectangular block in the width direction, the connection hole C that can be inserted connection end b ₁ of the flexible printed circuit board B is formed from the connection end face a _1, the connecting hole for C pore inner wall, a number of the contact mounting holes D aligned in the width direction of the connection end portion b ₁ is continuously molded. That is, these contact mounting holes D can be those having a pitch P ₂ which corresponds to the arrangement pitch P ₁ of the connection conductor b ₂ which is exposed on the surface of the connection end b ₁ of the flexible printed circuit board B, these contact F is in the contact mounting holes D which are soldered to the corresponding conductor foil e ₁ of the surface of the printed wiring board E is disposed, respectively.

[0004] As can be understood from FIG. 6, thin the contact F from the metal plate is stamped is retained from the substrate-side end face a ₂ of the insulating housing A is inserted into the respective contact attachment holes D projection f It is intended to be fixed at _1, and includes the flexible printed board connecting conductor b ₂ contact portions f ₂ of the pair capable of resiliently contacting the the B. Each contact F is an end surface a of the insulating housing A on the substrate side.
Has a lead portion f ₃ that is exposed from ₂ to the outside, the lead portion f ₃ is made to be respectively soldered to the corresponding conductor foil e ₁ to be patterned on a surface of the printed wiring board E, high density for implementation, these lead portions f ₃ is placed in a state of so-called "zigzag" shape arrangement leads f ₃ of the contacts F is projected in the opposite direction to adjacent in the width direction of the flexible printed circuit board B.

[0005]

By the way, the above-mentioned pair of outer surfaces a ₃ and a _{4 of the} connector for a flexible printed circuit board, that is, a surface having a large area parallel to the alignment direction of the contact mounting holes D is Since the connectors have exactly the same surface, there is a possibility that the front and back sides may be interchanged and mounted on the printed wiring board E when the connector is mounted on the printed wiring board E. If such a mixing occurs, the unit mounted on the printed wiring board E may be mounted. The whole becomes defective.

[0006] To prevent differences taken such, in the conventional, insulating housing A connection end face a ₁ on the outer surface a _3,
Although performing marking representing the front and back of a _4, the identification by small engraving subjecting the small connecting end face a ₁ in the area, it is difficult to find the front and back of the connector at a glance, to discover the occurrence of possible differences in advance Was difficult.

An object of the present invention is to provide an electrical connector structure in which the front and back sides of the connector can be seen at a glance, and the manufacturing cost does not increase, in view of the above-described problems of the electrical connector. is there.

[0008]

SUMMARY OF THE INVENTION To achieve this object, the present invention provides a connection hole through which a connection end of a flexible printed circuit board or the like can be inserted into a connection end surface of an insulating housing formed of resin as a rectangular parallelepiped block elongated in the width direction. Forming
A number of contact mounting holes aligned in the width direction of the connection end and connected to the connection hole are formed inside the insulating housing, and a number of contacts having leads exposed to the outside are formed on the substrate side of the insulating housing. In an electrical connector to be attached to each of the contact mounting holes from an end surface, an electrical connector is provided in which an uneven portion is formed on one of a pair of outer surfaces of the insulating housing extending in parallel to an alignment direction of the contact mounting holes. is there.

In the following description of a preferred embodiment of the present invention, 1) the lead portions of the respective contacts are arranged in a "plover" shape in the arrangement direction, and the concave portions of the concave and convex portions are formed of the leads. A structure that is a mark groove formed on an outer surface portion where no portion is present and that extends in the insertion direction of the connection end; 2) the protrusions of the uneven portion are formed on outer surfaces corresponding to both ends in the alignment direction; 3) a structure that is a ridge extending in the insertion direction of the connection end; 3) the recess of the uneven portion has corners corresponding to both ends in the alignment direction and extends in the insertion direction of the connection end; A structure that is a corner chamfer is described.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIGS. 1 to 3 show a connector for a flexible printed circuit board according to a first embodiment of the present invention. The connection end 2a of the flexible printed circuit board 2A can be inserted into an insulating housing 1A which is resin-molded as a rectangular block elongated in the width direction. The connection hole 3A has its connection end face 1a.
As with the conventional case, a large number of contact mounting holes 4A aligned in the width direction of the connection end 2a are continuously formed on the inner wall of the connection hole 3A.

[0011] That is, the contact mounting holes 4A which contacts 5A to be described later is disposed has a pitch P ₄ corresponding to the arrangement pitch P ₃ of the connecting conductors 2b which is exposed to the surface of the connecting end portion 2a of the flexible printed circuit board 2A However, the lead portions 5a of the contacts 5A located inside the contact mounting holes 4A are soldered to the corresponding conductor foils 6a on the surface of the printed wiring board 6A. Further, these contacts 5A are arranged in a "plover" shape such that the lead portions 5a adjacent to each other in the alignment direction face in opposite directions.

Each of the contacts 5A is stamped from a thin metal plate. These contacts 5A are inserted into the respective contact mounting holes 4A from the substrate-side end face 1b of the insulating housing 1A and fixed by the retaining projections 5c. Is done. Each of the contacts 5A has a pair of contact portions 5d in the contact mounting hole 4A which can elastically contact the connection conductor 2b of the flexible printed circuit board 2A.

The feature of the first embodiment resides in the concave / convex portions formed on one outer surface 1c of the insulating housing 1A, that is, the mark grooves 7, and these mark grooves 7 are provided on the flexible printed circuit board 2A.
Extend in the insertion direction of the connection end 2a. That is, the insulating housing 1A has the outer surfaces 1c and 1d having the same area.
However, a plurality of mark grooves 7 are formed on one of the outer surfaces 1c and 1d, that is, the outer surface 1c, for distinguishing the front and back. Describing the same mark groove 7, each mark groove 7 extending in the insertion direction of the connection end 2a of the flexible printed circuit board 2A is provided with every other contact 5A in which the lead portion 5a is located corresponding to the outer side surface 1c.
In a state located therebetween, it is formed as a groove width L substantially coincides with the arrangement pitch P ₁ of the connection conductor 2b.

Since the electrical connector according to the first embodiment has the structure described above, a plurality of mark grooves 7 are formed on the entire outer surface 1c of the insulating housing 1A. Only the front and back of the electrical connector can be identified. Therefore, when the electric connector is mounted on the surface of the printed wiring board 6A, the correctness of the mounting state of the electric connector can be easily visually recognized, so that the occurrence of a defective product due to the misplacement of the front and back of the electric connector can be surely prevented. In the case of the structure of this embodiment, each mark groove 7 is
a is formed on the outer surface 1c of the insulating housing 1A where there is no a, and the thickness of the insulating housing 1A corresponding to the pair of leads 5a of each contact 5A does not decrease. There is also an advantage that the housing 1A is securely held by a sufficiently thick portion.

FIG. 4 showing a second embodiment of the present invention is equivalent to FIG. 1 described above. In this embodiment, an insulating housing 1B in which a connection hole 3B and a contact mounting hole 4B are formed.
Structure, the structure of the contact 5B disposed in the contact mounting hole 4B, the insulating housing 1B and the connection end 2a.
And the relationship between the insulating housing 1B and the printed wiring board 6B are the same as in the case of the first embodiment described above. Second
The feature of the embodiment lies in the ridges 8 formed on the outer side surface 1c of the insulating housing 1B at portions corresponding to both ends in the alignment direction of the connection conductors 2b of the flexible printed circuit board 2B. These ridges 8 are integrally formed on the insulating housing 1B so as to be positioned in pairs at both ends of the outer surface 1c in a state of extending in the insertion direction of the connection end.

Since the electrical connector according to the second embodiment has the above-described structure, the outer surface 1 of the insulating housing 1B is provided.
Since a pair of ridges 8 are provided on the outer surface 1c of c and 1d, the front and back sides can be easily identified. Therefore, according to the structure of the second embodiment, as in the case of the first embodiment, it is possible to reliably prevent the occurrence of a defective product due to a mistake during mounting on the printed wiring board 6B.

FIG. 4 showing a second embodiment of the present invention is equivalent to FIG. 1 described above. In this embodiment, an insulating housing 1C in which a connection hole 3C and a contact mounting hole 4C are formed.
Structure of the contact 5C arranged in the contact mounting hole 4C, the insulating housing 1C and the connection end 2a.
And the relationship between the insulating housing 1C and the printed wiring board 6C are the same as those in the first embodiment described above. Second
A feature of this embodiment is a corner chamfer 9 formed at both end corners in the alignment direction of the connection conductor 2b of the flexible printed circuit board 2C in the outer surface 1c of the insulating housing 1C. Although not shown, the corner chamfers 9 extending in the insertion direction of the connection ends are formed at the time of molding the insulating housing 1C by positioning a pair of them at both ends of the outer surface 1c.

The electrical connector according to the second embodiment has the above-described structure.
Since a pair of corner chamfers 9 are provided on the outer side surface 1c of c and 1d, not only can the front and back sides be easily identified, but also the corner chamfers 9 can be formed simultaneously with the formation of the insulating housing 1C. The cost does not increase. Therefore, according to the structure of the second embodiment, as in the case of the first embodiment, it is possible to reliably prevent the occurrence of a defective product due to a mistake in mounting on the printed wiring board 6C.

[0019]

As is apparent from the above description, according to the electrical connector of the present invention, the unevenness is provided on one of the outer side surfaces of the insulating housing so that the front and back sides can be identified when mounted on the printed wiring board. In addition, it is possible to prevent the occurrence of a defective product due to a wrong electrical connector. Further, according to the present invention, in the case where the concave and convex portions are formed by the mark grooves, the convex stripes, and the corner chamfers, the occurrence of defective products due to the misconnection of the electric connectors can be ensured without increasing the production cost of the electric connectors. There is also an advantage that can be prevented.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part of a connector for a flexible printed circuit board according to a first embodiment of the present invention.

FIG. 2 is a view of the flexible printed circuit board connector.
FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG.

FIG. 3 is a view of the flexible printed circuit board connector.
FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged perspective view of a main part of a connector for a flexible printed circuit board according to a second embodiment of the present invention.

FIG. 5 is an enlarged perspective view of a main part of a connector for a flexible printed circuit board according to a third embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a main part of a conventional connector for a flexible printed circuit board.

FIG. 7 shows the connector for a flexible printed circuit board.
FIG. 7 is an enlarged sectional view taken along line 7-7 of FIG.

[Explanation of symbols]

 1A, 1B, 1C Insulated housing 1a Connection end face 1b Board side end face 1c, 1d Outer side face 2A, 2B, 2C Flexible printed board 2a Connection end 2b Connection conductor 3A, 3B, 3C Connection hole 4A, 4B, 4C Contact mounting hole 5A , 5B, 5C Contact 5a Lead 6A, 6B, 6C Printed wiring board 6a Conductive foil 7 Marking groove (irregular part) 8 Ridge (irregular part) 9 Corner chamfer (irregular part)

Claims (4)

[Claims] 1. A connecting hole through which a connecting end portion of a flexible printed circuit board or the like can be inserted in a connecting end surface of an insulating housing formed of a resin as a rectangular parallelepiped block elongated in a width direction,
A number of contact mounting holes aligned in the width direction of the connection end and connected to the connection hole are formed inside the insulating housing, and a number of contacts having leads exposed to the outside are formed on the substrate side of the insulating housing. An electrical connector attached to each of the contact mounting holes from an end surface, wherein an uneven portion is formed on one of a pair of outer surfaces of the insulating housing extending parallel to an alignment direction of the contact mounting holes. . 2. The lead portion of each of the contacts is arranged in a “twilight” shape in the arrangement direction, the concave portion of the concave-convex portion is formed on an outer surface portion where the lead portion does not exist, and the connection end portion is formed. 2. The electrical connector according to claim 1, wherein the electrical connector is a mark groove extending in the insertion direction of the electrical connector. 3. The projection of the projections and depressions, wherein the projections are formed on outer surfaces corresponding to both ends in the alignment direction and are projections extending in the insertion direction of the connection end.
Electrical connector as described. 4. The electric device according to claim 1, wherein the concave portions of the concave and convex portions are corners corresponding to both ends in the alignment direction and are corner chamfers extending in the insertion direction of the connection end. connector.